SystemUI: update keyguard state when profiles disable keyguard

Also add a broadcast receiver to watch for profile changes/updates and
update the tile whenever we receive those.

Ref: OSS NIGHTLIES-1721, CYNGNOS-1930

Change-Id: I68d4789159cb9a0a25609380054ae5545c9df5bd
Signed-off-by: Roman Birg <roman@cyngn.com>